BESMGC-2 - Bessey 800A Magnetic Earth Clamp

Heavy-Duty Grounding for Industrial Fabrication

The Bessey MGC-2 Magnetic Ground Clamp is a specialized welding accessory designed to solve one of the most common challenges in heavy fabrication: establishing a reliable ground connection on large, flat, or irregular workpieces. Unlike traditional spring-loaded clamps or C-clamps, which require a distinct edge or protrusion to grip, the MGC-2 utilizes a powerful magnetic base to adhere directly to the surface of the base metal. This capability is particularly critical in shipbuilding, tank manufacturing, and structural steel erection where the workpiece may be a continuous plate or pipe with no accessible edges near the weld zone.

Rated for a substantial 800 Amperes, this ground clamp is engineered for high-output welding processes, including heavy flux-cored arc welding (FCAW) and submerged arc welding (SAW), as well as high-amperage Stick and MIG applications. The unit features a large contact surface area which is essential for transferring such high current without excessive resistance. High resistance at the ground point can lead to arcing, overheating of the clamp, and unstable arc characteristics at the torch. By maximizing the contact area through magnetic adhesion, the MGC-2 ensures a cool, stable connection that maintains voltage consistency throughout the weld.

The construction of the MGC-2 reflects Bessey's reputation for quality industrial tools. It is built to withstand the thermal and mechanical stresses of the welding environment. The cable connection point is designed for a secure lug attachment, ensuring that the power cable remains firmly fixed even when the cable is dragged or repositioned. It is important to note that as a magnetic device, this clamp is effective only on ferromagnetic materials such as mild steel and carbon steel. It is not suitable for aluminum or non-magnetic stainless steel applications. For operators working with heavy steel structures, the MGC-2 offers a distinct efficiency advantage by reducing setup time and providing a flexible grounding location anywhere on the workpiece.